#include<bits/stdc++.h>

int main(){
    using namespace std;
    unsigned long N;
    cin >> N;
    vector<pair<pair<unsigned long, unsigned long>, unsigned long>> r(N);
    for(auto&& i : r){
        vector v{0, 0, 0};
        cin >> v[0] >> v[1] >> v[2];
        sort(v.begin(), v.end());
        i.first.first = v[0];
        i.first.second = v[1];
        i.second = v[2];
    }
    unsigned long ans{0};
    vector<unordered_map<unsigned long, unsigned long>> dp(1UL << N);
    const auto& enc = [](unsigned long x, unsigned long y) -> unsigned long { return x * 16777216 + y; };
    for(unsigned long i{0}; i < N; ++i){
        ans = max(ans, r[i].second);
        dp[1UL << i][enc(r[i].first.first, r[i].first.second)] = r[i].second;
        dp[1UL << i][enc(r[i].first.first, r[i].second)] = r[i].first.second;
        dp[1UL << i][enc(r[i].first.second, r[i].second)] = r[i].first.first;
    }
    const auto& chmax = [&ans](unsigned long& x, unsigned long a) -> unsigned long { ans = max(ans, a); return x = max(x, a); };
    for(unsigned long j{1}; j < 1UL << N; ++j)for(const auto& [s, h] : dp[j])for(unsigned long i{0}; i < N; ++i)if(!((j >> i) & 1)){
        unsigned long c{1UL << i};
        const auto& [x, y] = make_pair(s / 16777216, s % 16777216);
        if(r[i].first.first <= x && r[i].first.second <= y)chmax(dp[j | c][enc(r[i].first.first, r[i].first.second)], h + r[i].second);
        if(r[i].first.first <= x && r[i].second <= y)chmax(dp[j | c][enc(r[i].first.first, r[i].second)], h + r[i].first.second);
        if(r[i].first.second <= x && r[i].second <= y)chmax(dp[j | c][enc(r[i].first.second, r[i].second)], h + r[i].first.first);
    }
    cout << ans << endl;
    return 0;
}